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Keith's 2dof rig

Discussion in 'DIY Motion Simulator Projects' started by Keith, Mar 4, 2020.

  1. Keith

    Keith Active Member

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    Occupation:
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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Yes that is a very clean looking sim. Im actually chopping my drive shaft down by 6 inches to bring it down a bit. Next im going to build the bottom frame for traction loss. I might go through a couple prototypes for this.
    Last edited: May 10, 2020
  2. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    I made a bit of progress on the frame. Im not real happy with the wheels and how they are mounted but I just need to move on. Let me know if I made any mistakes or if you have a clever idea for me. Thanks! 20200517_145651.jpg 20200517_145646.jpg 20200517_145638.jpg 20200517_145634.jpg 20200517_145626.jpg 20200517_145619.jpg
    • Like Like x 3
  3. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Updated on my new frame. 20200529_151951.jpg
    • Like Like x 5
  4. tomkil192

    tomkil192 Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    Great job. I will send you my wheel ideas later on. To stabilise the rig you should have 2 wheels at the front
  5. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Ok that sounds great thanks!

    I made some more progress last night. Here's a pic 20200604_174301.jpg
    • Like Like x 1
    Last edited: Jun 10, 2020
  6. tomkil192

    tomkil192 Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    what seat do you use? is it comfortable?
    I have a bucket seat (SPARCO) and its great only for short period.
  7. tomkil192

    tomkil192 Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    BTW. with the speakers you have you probably don't need the rig at all. Just play the game loud and you will feel every move :):):)
    • Funny Funny x 1
  8. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    The seat is out of a Pontiac grand prix. Its pretty comfy. Its a power adjustable seat which is cool but the downside is weight. (80 lbs)
  9. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Lol pretty much. I have young kids now so I dont get a chance to really crank them up very often.
  10. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Hey guys. is there a way to adjust the baseline or the level point of my rig. I physically adjusted the levers and pots downward to avoid the rig from starting the motors up in reverse. now I just want to adjust the level point in the software if that makes sense. Im not sure If I have to reprogram the arduino or make adjustments to simtools. Thanks
  11. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    The most effective use of torque is at 90 degrees, anything over 40 degrees either side of that is very inefficient and just puts unnecessary strain on your motors.

    Your rig and base frame should be parallel at rest, as should the motor levers, with the rods at 90 degrees.

    I would suggest fixing the levers and rod mounts as per below and reset the Arduino accordingly.

    20200604_174301.jpg
  12. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform

    Thanks for the reply! In that picture the motors have fired up backwards. When the motor spins the correct direction it is at 90 degrees. Basically once I power down the rig it falls down and the motors will fire up in the wrong direction unless I prop up the cockpit. I think I might just replace the gt2 pulleys on the pots with bigger ones so it will have more than 180 degrees of rotation and cant start in the wrong direction.
  13. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    The first pic is where it rests while powered up correctly. Second pick is powered down. In the second pick you can see the lever swings beyond strait down. That is what is giving me the issue of starting up backwards

    Attached Files:

    • Like Like x 1
  14. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Hey guys. I am struggling to get my traction loss working. The movement works in SMC3 utility but does not work in simtools. The baud rate is set to 115200 and I shorted #8 to ground on the arduino uno. Here are a couple pics of simtools

    Attached Files:

  15. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    I figured it out.

    Attached Files:

  16. Michail

    Michail Member

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    Hi

    May you can explain your traction loss system? I have understand the prototype but after you finalize the third motor is no more at the back it is in front of the level.

    As well if you can, explain how you find out the height of your ujoint.

    I am try to make a similar rig like you and use the same motors. I want to make prototype (try and error) and then make it beauty.
  17. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform

    Yes that's the way to do it. The ujoint should be located as close to the top platform as possible. And you just want it placed somewhere so that the top platform is somewhat balanced(with a person seated) I have mine balanced to have extra weight on the front of the rig. This helped to hide the motor lash.

    I will take some pictures of the traction loss tonight
    • Like Like x 1
  18. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    Here are some pics of the traction loss. Sorry it's hard to get a good pic of it.

    Attached Files:

    • Like Like x 2
  19. Keith

    Keith Active Member

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    My Motion Simulator:
    2DOF, DC motor, Arduino, Motion platform
    And a quick video
    • Like Like x 3
  20. luu trung

    luu trung Member

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    My Motion Simulator:
    3DOF
    hi. i also have the same motor as you and have 1 question, will the motor be pushed down when there is no power supply?